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Report Number : 40494 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 10/13/2004 <br /> Project Name Beacon 3641 <br /> Project Number : 1641.18 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup. Sample Sample Analysis Date Percent Percent Percent Recov, Diff. <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov. Recov, Diff. Limit Limit <br /> Benzene 40492-06 <0.0050 0.0386 0.0392 0.0343 0.0366 mg/Kg EPA 8260B 10/11/04 88.8 93.4 5.08 70-130 25 <br /> Toluene 40492-06 <0.0050 0.0386 0.0392 0.0325 0.0343 mglKg EPA 8260B 10/11/04 84.1 87.6 4.02 70-130 25 <br /> Tert-Butanol 40492-06 <0.0050 0.193 0.196 0.168 0.166 mg/Kg EPA 8260B 10/11/04 87.1 84.4 3.07 70-130 25 <br /> Methyl-t-Butyl Ether 40492-06 <0.0050 0.0386 0.0392 0.0338 0.0323 mg/Kg EPA 8260B 10/11/04 87.6 82.4 6.13 70-130 25 <br /> Benzene 40541-25 <0.0050 0.0394 0.0388 0.0362 0.0356 mg/Kg EPA 8260B 10/12/04 92.0 91.7 0.315 70-130 25 <br /> Toluene 40541-25 <0.0050 0.0394 0.0388 0.0371 0.0363 mg/Kg EPA 8260B 10/12104 94.3 93.5 0.818 70-130 25 <br /> Tert-Butanol 40541-25 <0.0050 0.197 0.194 0.180 0.179 mg/Kg EPA 8260B 10/12/04 91.4 92.2 0.892 70-130 25 <br /> Methyl-t-Butyl Ether40541-25 <0.0050 0.0394 0.0388 0.0405 0.0388 mglKg EPA 8260B 10/12104 103 100 2.71 70-130 25 <br /> i <br /> F. , <br /> Approved B <br /> KiFF Ar>::'>s;;(TICAL, LLC Pp Y Joe iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />